语法专练（时态）
【小题1】Our new English teacher, who is said to have moved back to China, __________ (volunteer) in poor countries for almost ten years.
【小题2】—Why is the house in a mess, Tom?
—I __________ (decorate) it for Christmas since three days ago.
【小题3】The telephone __________ (ring) for almost a minute. Why doesn’t someone answer it?
【小题4】The journey is wonderful! It doesn’t feel like anything I __________ (experience) before.
【小题5】Tom __________ (work) in the library every night over the last three months.
【小题6】It __________ (rain) every day so far this month. I can’t tell you if we can go on an outing tomorrow.
【小题7】Although these scientists __________ (work) on the project for nearly four years, I don’t know how long it will last.
【小题8】The thief was caught stealing money from the shop opposite the school and __________ (question) by the local police for one day.
【小题9】This is Ted’s photo. We miss him a lot. He __________ (sacrifice) himself for trying to save a child in the earthquake.
【小题10】The students who are preparing for the National Entrance Examination for Postgraduate __________ (wait) outside the library for two hours.